MT#57011 app_lua: fix crash on exhausted memory scenario

Change-Id: Ic10d04559f53deaa552fd808cac88d10f11d35b2

debian/patches/series

@@ -42,6 +42,7 @@ upstream/dialog-dlg_get_var-assure-return-null-on-error.patch
 upstream/dialog-w_dlg_get_var-fix-incompatible-pointer.patch
 sipwise/dialog-dlg_get_var-changes-in-API.patch
 upstream/presence-No-autocommit-rollback-if-no-active-watcher.patch
+upstream/app_lua-fix-crash-on-exausted-memory-scenario.patch
 ### relevant for upstream
 sipwise/Makefile-support-parallelism-on-install-modules-doc-.patch
 sipwise/pua_dialoginfo-refresh_pubruri_avps_flag.patch

debian/patches/upstream/app_lua-fix-crash-on-exausted-memory-scenario.patch

@@ -0,0 +1,34 @@
+From: Victor Seva <vseva@sipwise.com>
+Date: Fri, 24 Mar 2023 10:26:15 +0100
+Subject: app_lua: fix crash on exausted memory scenario
+
+---
+ src/modules/app_lua/app_lua_api.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/src/modules/app_lua/app_lua_api.c b/src/modules/app_lua/app_lua_api.c
+index 0a1d135..1010fc5 100644
+--- a/src/modules/app_lua/app_lua_api.c
++++ b/src/modules/app_lua/app_lua_api.c
+@@ -912,6 +912,10 @@ void sr_kemi_lua_push_dict(lua_State *L, sr_kemi_dict_item_t *item) {
+ void
+ sr_kemi_lua_push_dict_item(lua_State *L, sr_kemi_dict_item_t *item)
+ {
++	if(!item) {
++		LM_CRIT("BUG: dict field empty\n");
++		return;
++	}
+ 	switch(item->vtype) {
+ 		case SR_KEMIP_NONE:
+ 			LM_CRIT("BUG: vtype is NONE\n");
+@@ -951,6 +955,10 @@ sr_kemi_lua_push_dict_item(lua_State *L, sr_kemi_dict_item_t *item)
+  */
+ int sr_kemi_lua_return_xval(lua_State* L, sr_kemi_t *ket, sr_kemi_xval_t *rx)
+ {
++	if(!rx) {
++		LM_CRIT("BUG: xval field empty\n");
++		return 0;
++	}
+ 	switch(rx->vtype) {
+ 		case SR_KEMIP_NONE:
+ 			return 0;